The practical application based on the reflection of sound
The practical application based on the reflection of sound
The correct option is D (d). Both (a) and (b)
Step 1:
Amplification of a person’s voice is done by a portable megaphone. The megaphone is a cone-shaped acoustic horn. The person holds the smaller end of the horn near the mouth and the bigger end of the horn releases the louder sound. So (a) is correct.
Step 2:
Soundboard is the big concave board placed focusing on the speaker. The soundboard receives the sound from the speaker and reflects it towards the audience. This helps the audience to hear the sound very clearly even if they are away from the speaker. So (b) is correct.
Step 3:
The vibration density, tension, and frequency are measured by Sonometer. It does not help in the reflection of sound. So (c) is incorrect.
Step 4:
Both Megaphone and sounding board implement the practical application based on sound reflection. So both (a) and (b) are correct.
Final answer:
The correct option is (d) both (a) and (b).
(d). Both (a) and (b)
Step 1:
Amplification of a person’s voice is done by a portable megaphone. The megaphone is a cone-shaped acoustic horn. The person holds the smaller end of the horn near the mouth and the bigger end of the horn releases the louder sound. So (a) is correct.
Step 2:
Soundboard is the big concave board placed focusing on the speaker. The soundboard receives the sound from the speaker and reflects it towards the audience. This helps the audience to hear the sound very clearly even if they are away from the speaker. So (b) is correct.
Step 3:
The vibration density, tension, and frequency are measured by Sonometer. It does not help in the reflection of sound. So (c) is incorrect.
Step 4:
Both Megaphone and sounding board implement the practical application based on sound reflection. So both (a) and (b) are correct.
Final answer:
The correct option is (d) both (a) and (b).
